CN113563857B - Alloy material for surface tension treatment of thickened oil and application method thereof - Google Patents
Alloy material for surface tension treatment of thickened oil and application method thereof Download PDFInfo
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- 238000000034 method Methods 0.000 title claims abstract description 22
- 239000013078 crystal Substances 0.000 claims abstract description 14
- 239000011159 matrix material Substances 0.000 claims abstract description 12
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 claims abstract description 9
- 239000000654 additive Substances 0.000 claims abstract description 9
- 229910052725 zinc Inorganic materials 0.000 claims abstract description 9
- 239000011701 zinc Substances 0.000 claims abstract description 9
- 230000000996 additive effect Effects 0.000 claims abstract description 7
- 230000005684 electric field Effects 0.000 claims abstract description 7
- 239000012530 fluid Substances 0.000 claims abstract description 5
- 229910045601 alloy Inorganic materials 0.000 claims abstract description 4
- 229910052802 copper Inorganic materials 0.000 claims abstract description 4
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 4
- 229910052727 yttrium Inorganic materials 0.000 claims abstract description 4
- 239000003921 oil Substances 0.000 claims description 73
- 239000010779 crude oil Substances 0.000 claims description 26
- 238000003672 processing method Methods 0.000 claims 1
- 239000000126 substance Substances 0.000 abstract description 6
- 230000008901 benefit Effects 0.000 abstract description 5
- 230000008859 change Effects 0.000 abstract description 5
- 238000005265 energy consumption Methods 0.000 abstract description 4
- 239000006227 byproduct Substances 0.000 abstract description 2
- 239000000463 material Substances 0.000 abstract description 2
- 239000001993 wax Substances 0.000 description 13
- 230000009467 reduction Effects 0.000 description 11
- 238000005516 engineering process Methods 0.000 description 9
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- 238000010438 heat treatment Methods 0.000 description 8
- 244000005700 microbiome Species 0.000 description 7
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- 239000000839 emulsion Substances 0.000 description 6
- 230000000694 effects Effects 0.000 description 5
- 239000004094 surface-active agent Substances 0.000 description 5
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 238000009826 distribution Methods 0.000 description 4
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- 239000000084 colloidal system Substances 0.000 description 3
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- 229910052779 Neodymium Inorganic materials 0.000 description 2
- 230000008021 deposition Effects 0.000 description 2
- 230000018109 developmental process Effects 0.000 description 2
- 230000005686 electrostatic field Effects 0.000 description 2
- 238000004945 emulsification Methods 0.000 description 2
- 239000003995 emulsifying agent Substances 0.000 description 2
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- 238000000197 pyrolysis Methods 0.000 description 2
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- 241000894006 Bacteria Species 0.000 description 1
- 238000010795 Steam Flooding Methods 0.000 description 1
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- 229920001222 biopolymer Polymers 0.000 description 1
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- 238000009833 condensation Methods 0.000 description 1
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- 238000007865 diluting Methods 0.000 description 1
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- 230000001804 emulsifying effect Effects 0.000 description 1
- 229910001385 heavy metal Inorganic materials 0.000 description 1
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- 239000003129 oil well Substances 0.000 description 1
- 239000003960 organic solvent Substances 0.000 description 1
- 238000013021 overheating Methods 0.000 description 1
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- 238000000053 physical method Methods 0.000 description 1
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- 230000007704 transition Effects 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
- C09K8/58—Compositions for enhanced recovery methods for obtaining hydrocarbons, i.e. for improving the mobility of the oil, e.g. displacing fluids
-
- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
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- C—CHEMISTRY; METALLURGY
- C22—METALLURGY; FERROUS OR NON-FERROUS ALLOYS; TREATMENT OF ALLOYS OR NON-FERROUS METALS
- C22C—ALLOYS
- C22C38/00—Ferrous alloys, e.g. steel alloys
- C22C38/005—Ferrous alloys, e.g. steel alloys containing rare earths, i.e. Sc, Y, Lanthanides
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21B—EARTH OR ROCK DRILLING; OBTAINING OIL, GAS, WATER, SOLUBLE OR MELTABLE MATERIALS OR A SLURRY OF MINERALS FROM WELLS
- E21B31/00—Fishing for or freeing objects in boreholes or wells
- E21B31/06—Fishing for or freeing objects in boreholes or wells using magnetic means
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F1/00—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties
- H01F1/01—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials
- H01F1/03—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity
- H01F1/032—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials
- H01F1/04—Magnets or magnetic bodies characterised by the magnetic materials therefor; Selection of materials for their magnetic properties of inorganic materials characterised by their coercivity of hard-magnetic materials metals or alloys
- H01F1/047—Alloys characterised by their composition
- H01F1/053—Alloys characterised by their composition containing rare earth metals
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F41/00—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties
- H01F41/02—Apparatus or processes specially adapted for manufacturing or assembling magnets, inductances or transformers; Apparatus or processes specially adapted for manufacturing materials characterised by their magnetic properties for manufacturing cores, coils, or magnets
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Power Engineering (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Metallurgy (AREA)
- Mechanical Engineering (AREA)
- Oil, Petroleum & Natural Gas (AREA)
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- Mining & Mineral Resources (AREA)
- Marine Sciences & Fisheries (AREA)
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- Production Of Liquid Hydrocarbon Mixture For Refining Petroleum (AREA)
Abstract
The invention relates to an alloy material for surface tension treatment of thick oil, which consists of a matrix phase and a Ce additive phase. Wherein the matrix phase is
The alloy component of the Ce additive phase is expressed as mass percent
Description
Technical Field
The invention relates to the technical field of oil and gas exploitation, in particular to an alloy material for surface tension treatment of thickened oil and an application method thereof.
Background
The heavy oil is a complex mixture of multiple hydrocarbons rich in colloid and asphaltene, and is characterized by high density, high viscosity and poor fluidity. Heavy oil, generally refers to crude oil having a subsurface viscosity greater than 50 centipoise or a relative density greater than 0.92g/cm 3.
The distribution of China's heavy oil resources is wide, most of the heavy oil in the oil-gas-containing basin and conventional oil present the characteristics of symbiosis and regular transition distribution, the heavy oil resources are very rich and account for more than 25% to 30% of the total oil resources, and the estimated amount of China's heavy oil resources is about 250 hundred million tons and accounts for 28% of the total geological reserves of the oil, and large-scale exploitation is already put into practice at present. With the continuous exploitation of the conventional crude oil, the reserve and the yield of the conventional crude oil are continuously reduced, and the proportion of the development and the production of the thick oil is increased to meet the increasing requirements of industrial and agricultural production on energy resources. Due to the characteristics of high density, high viscosity and high condensation point, the thick oil is more difficult to recover and transport than other paraffin-based crude oil. Therefore, the viscosity problem of the thickened oil is solved, the surface tension of the thickened oil is reduced, and the method has important significance for thickened oil exploitation, pipe transportation and the like.
The prior demulsifying and viscosity reducing product is widely applied to the thermal recovery of the thickened oil. The steam huff and puff of the heavy oil well and the steam flooding of the heavy oil well obviously improve the heavy oil recovery result.
The conventional common demulsification and viscosity reduction technologies mainly comprise the following technologies:
heating viscosity reduction technology
The thermal viscosity reduction exploitation of thick oil applies the high sensitivity of the thick oil to the temperature, namely the viscosity of the thick oil is smaller when the temperature is higher. The temperature of the thick oil layer is increased by applying a process means (such as an electromagnetic heating technology), the viscosity of the thick oil in the oil layer is reduced, and the fluidity of the oil layer is improved to extract the thick oil. The thick oil heating and conveying method is a conveying method which increases the flowing temperature of thick oil and reduces the viscosity of the thick oil in a heating mode, thereby reducing the friction loss of a thick oil pipe. The heating and conveying method is the main crude oil conveying method at home and abroad at present, but the energy consumption is high, and more than 1 percent of crude oil conveying quantity is consumed.
Thinning technique by blending thin oil
The thin oil mixing viscosity reducing method is a method of diluting the produced thick oil on the ground to reduce the viscosity of the thick oil, and then conveying the thick oil in a mixture form through a pipeline. It uses the principle of similar and compatible organic solvent, and uses some low-viscosity liquid compounds as diluent, including condensate oil, naphtha, some light oil, etc. The method has the advantages that the conventional crude oil conveying system can be directly utilized to convey the thick oil, and the phenomenon of thick oil solidification can not occur during the period of stopping conveying. The disadvantages are that a special pipeline is needed to convey the thin oil production place to the oil field to be mixed with the thick oil, the energy consumption is caused by multiple mixing and dehydration, the quality of the thick oil is changed after the thin oil is mixed, and the economic benefit is not ideal.
(III) microwave viscosity reduction technology
The microwave non-thermal effect is utilized to modify the thickened oil, the chemical components of the thickened oil are changed, and the rheological property of the thickened oil is irreversibly improved, so that the purpose of quickly reducing the viscosity is achieved. Due to high microwave heating efficiency, high speed, cleanness and no pollution, the rheological property of the thick oil can be changed by the change of the content of asphaltene colloid, and the change is beneficial to the development and gathering of the thick oil in most cases.
However, due to the micro-heterogeneity of the viscous oil colloid structure and the selectivity of microwave heating, the macro-distribution and the micro-distribution of the internal temperature of the viscous oil are uneven in the microwave heating process, a local overheating phenomenon that the temperature of asphaltene colloidal particles exceeds the pyrolysis temperature of colloidal asphaltenes appears at certain positions in the viscous oil, the pyrolysis of part of colloidal asphaltenes causes the chemical structure change and the content of the colloidal asphaltenes to be reduced, and other components of the viscous oil are increased.
(IV) emulsifying viscosity-reducing technology
The emulsification and viscosity reduction means that under the action of a surfactant, a w/o type emulsion of the thickened oil is converted into an o/w type emulsion, so that the purpose of viscosity reduction is achieved. In the emulsification and viscosity reduction, a surfactant with better water solubility is used as an emulsifier, an emulsifier aqueous solution with a certain concentration is injected into an oil well or a pipeline to disperse crude oil to form o/w shaped emulsion, the friction between an oil film and an oil film when the crude oil flows is changed into the friction between the water film and the water film, and the viscosity and the friction resistance are greatly reduced; and meanwhile, a thick oil film on the surface of the oil pipe or the sucker rod is damaged, the surface wetting lipophilicity is changed into hydrophilicity, a continuous water film is formed, and the resistance of crude oil flowing in the pumping process is reduced.
The surfactant is used for viscosity reduction, so that more problems still exist, and demulsification is difficult after production; the difficulty of sewage treatment is high; because the composition difference of the thickened oil is large, the surfactant has poor selectivity on the thickened oil; the viscosity reducer has limited high temperature resistance, salt resistance and mineralization resistance; even if the effect is better, the cost is higher, and the method is not economical.
(V) microorganism viscosity reduction technology
Degrading heavy components such as asphaltene in the crude oil by using a microbial degradation technology, wherein the microorganisms degrade hydrocarbons such as paraffin and asphaltene to reduce the viscosity and wax content of the crude oil; during the stratum metabolism process, the microorganism generates biosurfactant and other organic matters, so that the oil-water interfacial tension is reduced, and the permeability of crude oil in an oil reservoir is improved; the aerogenic bacteria in the microorganisms can generate a large amount of gas in the stratum activity, so that the crude oil is expanded and the viscosity is reduced.
The limitation of this technology is that microorganisms are easily destroyed under the oil reservoir conditions of high temperature, high salinity and high heavy metal ion content, the surfactant and biopolymer produced by the microorganisms are dangerous to cause precipitation, and the conditions for culturing the microorganisms are not easy to grasp.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the method overcomes the defects of the prior art, provides a thickened oil surface tension treatment scheme which is based on a physical method, is simple and convenient to operate, has low cost and does not influence the quality of crude oil, and specifically comprises the following steps: an alloy material for surface tension treatment of thick oil and an application method thereof.
In one aspect, the invention relates to an alloy material for thick oil surface tension treatment, which consists of a matrix phase and a Ce additive phase. Wherein the matrix phase is (PrDy) 2 Fe 14 B, the alloy component of the Ce additive phase is expressed by mass percent as ((Nd, pr) 1-x-y Re x Ce y ) 30～55 Fe bal B 0.2～1 TM 0.5～2.0 Wherein Re is one or more of La, nd, gd and Y, TM is one or more of Co, ga and Cu, x is more than or equal to 0 and less than or equal to 0.1, and Y is more than or equal to 0.2 and less than or equal to 0.6;
the matrix phase (PrDy) 2Fe14B is a nanoscale flaky crystal, the length of the nanoscale flaky crystal is 200-500 nanometers, and the thickness of the nanoscale flaky crystal is 50-100 nanometers.
In another aspect, the present invention relates to a method for treating thick oil surface tension based on the above alloy material, in which the above alloy material is used as a permanent magnetic material to match with a zinc plate, so as to generate a stable magnetic field space, so that a stable electric field can be generated when a conductive fluid flows through the magnetic field space between the alloy material and the zinc plate.
When the emulsion is placed in the weak electric field, the surface tension of solute molecules can be changed to break the original equilibrium state, so that small molecules are difficult to maintain a stable suspension state and are separated out in a layering way.
Preferably, the field strength is found to stabilize at 35mv/m when the crude oil flows through the magnetic field space at a velocity of 1.5 m/s.
When oil passes through an electrostatic field with continuous action, the entanglement degree of molecular groups is reduced, the intermolecular force is weakened, and the kinematic viscosity is reduced within a certain time. The released current makes wax and emulsion droplet molecules in the crude oil orderly arranged and parallel to the pipeline wall, reduces the wax molecules from being pushed to the pipeline wall, reduces the deposition of the wax molecules on the pipeline wall, reduces the resistance of a pipeline wall condensate layer to the flow of the crude oil, and achieves the purpose of demulsification; the wax molecules orderly flow and gather to reduce the chance of mutual adhesion and inhibit the growth of wax crystal particles; the fine wax crystal particles are suspended in the crude oil and are easy to flow in a pipeline, so that the possibility of rotation of molecules and solid particles in the crude oil is reduced, and a certain viscosity reduction effect is also realized.
The method for treating the surface tension of the thickened oil has the advantages of no need of additional chemical additives and energy consumption, simple and convenient operation, low cost, no byproduct generation, no change of chemical components of the thickened oil, and good economic benefit.
Detailed Description
The following examples are only for illustrating the technical solutions of the present invention more clearly, and the protection scope of the present invention is not limited thereby.
The invention provides an alloy material for surface tension treatment of thick oil, which consists of a matrix phase and a Ce additive phase. Wherein the matrix phase is (PrDy) 2 Fe 14 B, the alloy component of the Ce additive phase is expressed by mass percent as ((Nd, pr) 1-x-y Re x Ce y ) 30～55 Fe bal B 0.2～1 TM 0.5～2.0 Wherein, re is one or more of La, nd, gd and Y, TM is one or more of Co, ga and Cu, x is more than or equal to 0 and less than or equal to 0.1, and Y is more than or equal to 0.2 and less than or equal to 0.6;
the matrix phase (PrDy) 2Fe14B is a nanoscale flaky crystal, the length of the nanoscale flaky crystal is 200 nanometers, and the thickness of the nanoscale flaky crystal is 100 nanometers.
The invention also relates to a thick oil surface tension treatment method based on the alloy material, wherein the alloy material is an alloy material with strong coercivity, and is matched with a zinc plate as a permanent magnet material to generate a stable magnetic field space, so that when a conductive fluid flows through the magnetic field space between the alloy material and the zinc plate, the conductive fluid is acted by Lorentz force to generate a stable electric field, and the electric field intensity is measured to be stable to 35mv/m when the crude oil flows through the magnetic field space at the flow speed of 1.5 m/s. When oil flows through an electrostatic field with continuous action, the entanglement degree of molecular groups is reduced, the intermolecular resultant force is weakened, the surface tension of solute molecules is changed to break the original equilibrium state, so that small molecules are difficult to maintain a stable suspension state, and are separated out in a layering manner, and the kinematic viscosity is reduced within a certain time. The released current makes wax and emulsion droplet molecules in the crude oil orderly arranged and parallel to the pipeline wall, reduces the wax molecules from being pushed to the pipeline wall, reduces the deposition of the wax molecules on the pipeline wall, reduces the resistance of a condensed oil layer on the pipeline wall to the flow of the crude oil, and achieves the purpose of demulsification; the wax molecules orderly flow and gather to reduce the chance of mutual adhesion and inhibit the growth of wax crystal particles; the fine wax crystal particles are suspended in the crude oil and are easy to flow in a pipeline, so that the possibility of rotation of molecules and solid particles in the crude oil is reduced, and a certain viscosity reduction effect is also realized.
The above description is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, it is possible to make various improvements and modifications without departing from the technical principle of the present invention, and those improvements and modifications should be considered as the protection scope of the present invention.
Claims (4)
1. An alloy material for thick oil surface tension treatment, which consists of a matrix phase and a Ce additive phase, and is characterized in that the matrix phase is as follows:
the alloy components of the C e addition phase are expressed by mass percent
Wherein Re is one or more of La, nd, gd and Y, TM is one or more of Co, ga and Cu, x is more than or equal to 0 and less than or equal to 0.1, and Y is more than or equal to 0.2 and less than or equal to 0.6.
2. The alloy material for thick oil surface tension treatment as claimed in claim 1, wherein the matrix phase (PrDy) 2Fe14B is nano-scale plate-shaped crystal, the length of the nano-scale plate-shaped crystal is 200 nm to 500 nm, and the thickness of the nano-scale plate-shaped crystal is 50 nm to 100 nm.
3. The method for processing thick oil surface tension of alloy material for thick oil surface tension processing according to claim 1, wherein the alloy material for thick oil surface tension processing is matched with a zinc plate as a plate-shaped permanent magnet alloy material, a stable magnetic field space is generated between the plate-shaped permanent magnet alloy material and the zinc plate, and a stable electric field can be generated when a conductive fluid flows through the magnetic field space between the alloy material and the zinc plate.
4. The thick oil surface tension processing method of claim 3, wherein the intensity of the electric field generated when the crude oil flows through the magnetic field space at a flow rate of 1.5m/s is stabilized at 35mv/m.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
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| CN202010357389.0A CN113563857B (en) | 2020-04-29 | 2020-04-29 | Alloy material for surface tension treatment of thickened oil and application method thereof |
| PCT/CN2020/101541 WO2021217890A1 (en) | 2020-04-29 | 2020-07-13 | Alloy material for heavy oil surface tension treatment, and method for using same |
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| CN202010357389.0A CN113563857B (en) | 2020-04-29 | 2020-04-29 | Alloy material for surface tension treatment of thickened oil and application method thereof |
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| WO2014124793A1 (en) * | 2013-02-12 | 2014-08-21 | Siemens Aktiengesellschaft | Method for producing high energy magnets |
| CN105199777A (en) * | 2015-10-23 | 2015-12-30 | 西安石油大学 | High-frequency crude oil dehydrator |
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| AU2004202956A1 (en) * | 2000-04-24 | 2004-07-29 | Shell Internationale Research Maatschappij B.V. | In Situ Recovery From a Hydrocarbon Containing Formation |
| CN102604616A (en) * | 2012-02-13 | 2012-07-25 | 宋雪婷 | Crude oil viscosity reducing device and preparation method of crude oil viscosity reducing device |
| WO2014124793A1 (en) * | 2013-02-12 | 2014-08-21 | Siemens Aktiengesellschaft | Method for producing high energy magnets |
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